“Few-Shot, Transfer, and Meta-Learning in Naturally Data-Scarce Vertical Domains: A Cross-Sector Methodological Survey from Rare-Disease Diagnosis, Emerging-Financial-Product Risk Management, Autism Spectrum Variability, and Low-Resource Language Processin”. Journal of Global Engineering Review, vol. 4, no. 1, Apr. 2026, https://doi.org/10.66372/.